I was reading Farm Industry News the other night and came across an article about RTK corrections and their availability increasing in the midwest.  They also mentioned that many state DOT's are using RTK for construction projects and that we(farmers) may be able to use that signal for free!  Has anyone heard of this?  Free RTK corrections...sign me up!  There were links to websites with more info on the DOT networks in the article but I have not had time to research it any further yet.

They did mention that the support for these signals may not always be 24/7...state dept hours maybe?